function IsPC() {  
   var userAgentInfo = navigator.userAgent;  
   var Agents = new Array("Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod");  
   var flag = true;
   for (var v = 0; v < Agents.length; v++) {
       if (userAgentInfo.indexOf(Agents[v]) > 0) {
       	flag = false;
       	break;
       }
   }
   return flag;
  }